6378740 has 48 divisors (see below), whose sum is σ = 14433552. Its totient is φ = 2359296.

The previous prime is 6378733. The next prime is 6378761. The reversal of 6378740 is 478736.

It can be written as a sum of positive squares in 8 ways, for example, as 1162084 + 5216656 = 1078^2 + 2284^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6378740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24692 + ... + 24948.

It is an arithmetic number, because the mean of its divisors is an integer number (300699).

Almost surely, 2^6378740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6378740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7216776).

6378740 is an abundant number, since it is smaller than the sum of its proper divisors (8054812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6378740 is a wasteful number, since it uses less digits than its factorization.

6378740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 6378740 is about 2525.6167563587. The cubic root of 6378740 is about 185.4577415769.

The spelling of 6378740 in words is "six million, three hundred seventy-eight thousand, seven hundred forty".